AB Quality Allen-Bradley 1394, User Manual

Page: 75 / 301

Publication 1394-5.0 — May 2000
Wiring System, Axis, and Shunt Modules, and Motors (for all systems) 3-29
Wiring the Shunt Module Power
There are three types of cable that can be used to connect the 1394
shunt module to your 1394 system module. All shunt power wiring
should meet the following general specifications:
• 8 AWG (8.4 mm
2
)
• 105
°
C
• 600V
• Maximum length of each wire is 3.05 m (10 ft.).
• If you mount the shunt module outside the cabinet, the shunt
power cables and fan wiring must be inside metal conduit to
minimize the levels of EMI and RFI.
To minimize the levels of EMI and RFI inside your cabinet, we
recommend you:
• Use a single cable that contains a twisted pair with an overall
shield. The shunt module is designed to accept a metal conduit
which will also act as an overall shield.
• Route your shunt power cables with motor power cables.
• Separate shunt power cables from other sensitive, low voltage
signal lines.
The table below details your shunt power wiring options.
To connect the shunt module to the 22 kW system module:
1. Verify that there is no 24V control or 360/480V power applied to
the system.
2. Open the front door of the system module.
3. Insert one end of one user-supplied 8.4 mm
2
(8 AWG), 105
°
C
(221
°
F), 600V, shielded wire in the terminal block labeled COL.
4. Insert one end of the other user-supplied 8.4 mm
2
(8 AWG),
105
°
C (221
°
F), 600V, shielded wire in the terminal block
labeled DC +.
5. Tighten both screw terminals (torque = 2.5 N-m, 22.1 lb-in.).
6. Gently pull on each wire to make sure it does not come out of its
terminal. Re-insert and tighten any loose wires.
For this Type of Cable: Twist Conductors (Y/N):
Twisted pair with overall shield N
Twisted pair (no shield) N
Discrete conductors
1
Y (2 twists per foot)
1
Twisting cancels most of the RFI noise for the two conductors. Refer to Figure 3.18 and Figure 3.19 for
more information.